Movable endless grate having romovable memebers.



P. COMET & F. COULON.

MOVABLE ENDLESS GRATE HAVING REMOVABLE MEMBERS.

APPLICATION HLED AUG.27. 1915.

31 258,535. Patented Mar. 5, 1918.

Cb 2 6 \Q/ I i, 1 i I I i 2572. 7

PIERRE COMET AND FRANQOIS COULON, 0F BAGNERES-DE-BIGORRE, FRANCE.

MOVABLE ENDLESS GRATE HAVING REMOVABLE MEMBERS.

Application filed August 27, 1915.

To all whom it may concern:

Be it known that we, PIERRE Conn-3r and FRANCOIS CoULoN, manufacturing engineers, of Bagnercs-de-Bigorre, flames-Pyrenees Department, in the Republic of France, and citizens of the Republic of France, have invented certain new and useful Improvements in Movable Endless Grates Having Removable lllem'bers, of which the following is a specification.

This invention relates to endless grates having removable members composed of a series of bar: secured to endless chains and on each of which a series of members designed to support the coal are removably mounted. The grate thus made forms a sort of endless conveyor which is moved slowly in a, 'manner either continuous or intermittent as the combustion of the coal goes on.

The primary object of the invention is to provide a grate of this class having bars and members of a particular shape for the purpose of securing, by the automatic clearance of theair passages, the eliiciency and the duration of the grate.

Each of the members consists of a T shaped piece the stem of which is slotted for the purpose of being placed on the bar; the cross section of such slot as well as that of the bar are of a suitable shape, for instance T shaped, to allow of the members placed on the bar being slidable thereon, while not permitting them to be disengaged when moved in a direction perpendicular to the plane of the g 'ate.

Furthermore, the slots of a certain number of members have a large part higher up than that of the other members, so that the vertical play of the members on one and the same bar is not the same for all, and that, on the reversal of such bar upside down, there is produced under the action of the weight a displacement relative of the members with regard to one another, those the slot of which is greater sliding farther down on to the bar than the others. In arranging alternatively the members the slots of which are different, there is obtained a displacen'ient relative between all the consecutive members. Such displacement has the effect of insuring the fall of the cindel's and of the clinker engaged between the members, which is of the greatest importance in that Specification of Letters Patent.

Patented Mar. 5, 1918.

Serial No. 47,622.

which concerns the efficiency and the duration of the grate, the complete clearance is required to allow of the grate remaining uniformly pervious t0 the air and well cooled by the passage of the latter.

While the single displacement on the reversion of the endless grate is usually sufficient to insure the fall. of the cinders, there may be provided however underneath the grate a horizontal roller or any other device on which the upset grate will come and run and thus cause the members to rise for the purpose of falling down again farther on. In this way, the clearance of the grate is made perfect by breaking off the slight amount of cold clinker which may have adhered to the members after the displacement of the latter brought about by the roversion of the grate.

With such means, the clearance is obtained simply by the forward motion of the endless grate and by the reversion of the same.

It must be stated that the T shape of the slots and the bar is only shown by way of example, as the members may be connected to the bar in any other suitable way which allows of the. members being moved vertically in respect to one another under the sole influence of the weight on the reversion of the bar.

The accompanying drawings show by way of example one embodiment of a bar on which are mounted members of two different types.

Figures 1 and are a vertical section and a plan View of the bar and of the members.

Figs. 3 and t are elevations of a separate member and Fig. 5 is an elevation of another member.

Figs. 6 and 7 are vertical sections showing modified arrangements of the bars and members mounted on such ba Fig. 8 is a vertical diagram of the grate as a whole.

1 designates a flat. bar one edge of which is so strengthened by the ribs 2 as to show a T shaped section; this bar is secured by its opposite edges to the endless chains 8 which carry forward the grate as a whole.

On such bar are strung up T shaped members the stem 3 of Which presents a slot of a corresponding shape, comprising a narrower part a and a Wider part 5. This wider part is of a variable height; in some members a, the height is only very little superior to the thickness of the ribs 2, so that on the reversion of the bar, these members hardly shift their position relative to the latter; in the members b, b, the wider part 5 is of a greater height, and it is still higher in the members 0, so that on the reversion of the bar, these members are slidable clownwardly in respect to the bar, the amount of slide being different. Therefore if the bars a, Z) or 6 c are alternative, the successive members are displaced with respect to one another as required for the purpose of insuring the clearance of the air passages between the members.

The transversal parts or wings 6 of the members are preferably of a triangular shape and are arranged so that they may form together a dihedral angle as here shown for the members a, Z), or they may be ar ranged in one and the same plane, as herein shown for the members 6 and 0, such plane being perpendicular or oblique with regard to the bar.

The members placed at the ends of the bars will be preferably stronger than the others and of a suitable shape in order that the bar as a whole provided with its members may constitute a rectangular portion of the surface of the grate,

Small projections 7 may be formed on the wings of the members for the purpose of maintaining their distance and their parallelism.

9 designates a roller placed underneath the grate so as to act on the members when they pass thereon, in raising the same, and in letting them fall after they pass the roller. lVhile the weight of the members is usually sutlicient to insure the return of the members to their place when they come back to the upper part of the grate, there may be provided at the entrance of the latter a horizontal roller 10 or any other suitable device for the purpose of causing the members to come back to their place at one and the same level before they are loaded again with the coal.

Of course, instead of giving to the upper part of the bars and to the corresponding part 5 of the slots of the members, a rectangular shape as herein shown, there may be given to them a shape having inclined parts, or a round or any other suitable shape, in always allowing a vertically trauslatory motion of the members with regard to the bar.

Instead of letting the member rest, at its middle, on a single bar, a longer member may be provided and which may rest near its ends on two bars as shown for instance, in Fig. 6, or again the member may be supported at both its ends themselves as shown for instance in Fig. 7, and so on, all these attaching shapes always allowing, on account of the dimensions of the slots and of the supports, the said vertical motion.

it again goes without saying that the limitation of the vertical displacement, of each member with regard to the bar or the bars which carry the; same can be obtained by means of slots, openings, any kind of abutments, projections associated with or brought on to either the bars or on the members, and so on.

With such a device, any member can be easily replaced even during the combustion; when the respective bar comes to the front of the fire-box, that is to say, outside the same, in front of the charging hopper, one or more members can be removed or put back through the side.

Claims:

1. The combination of a movable endless grate conmrisinp; endless chains, bars fixed to such. chains, members on such bars, adapted to move freely with regard to the said bars under the influence of their weight, rotary means around which the endless chains are guided, with a roller placed transversely underneath the grate and adapted to engage the members when they pass onto such roller so as to raise the same and to let the said members fall again, after passing the roller, and means for positively returning said members to their position on the bars as the said members pass to the upper part of the grate.

The combinations of a movable endless grate comprising endless chalns, bars fixed to such chains, members on such bars, adapted to move freely on tle sald bars under the influence of their weight, rotary means which revolve in the same direction and around which the endless chains are guided, with a member arranged transversely in front of the part of the grate which moves up and adapted to engage the said members to cause the same to move down again with regard to the bars.

The combination of a movable endless grate comprising endless chains, bars fixed to said chains and having heads at their outer edges, grate members onsaid bars having slots engaged by said heads to permit the members to move vertically on the said bars under the influence of their weight, the slots of different members extending variable distances inward, rotary members around which the endless chains pass, the weight. of said rate members when the latter are passing to the lower run causing them to move down on said bars, a transve'sely extending roller underneath the grate adjacent the downwardly moving part thereof and adapted to be engaged by the said members to raise the latter on the bars and to permit the members to fall after pass 111;; the roller, and a transversely extending names in presence of two subscribing Wit roller arran od in front of the part of the nesses. grate moving upward and adapted to engage the said members to cause the some to again move downward on said 1321138.

In testimony that we claim (he foregoing as our invention, we, have signed 0111' PIERRE COMET. FRANQOIS COULON. Witnesses:

CHAS. P. DE BAEssY, WILLIAM P. SIH'JCKLEY.

80p!" of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

